Calibrated to contain. With marking spot and ST stopper. Precision grade 'unserialized' flasks, that meet the requirements for type 1, Class A, Federal Specification NNN-F-289, and also ASTM Specification E 288. The 1and 2ml size are test tube shaped, an
                    Unit of Measure
                    
               
        
            
                                                                                Capacity | 
                                                                        N/A 5 mL | 
                                                                                Tolerance | 
                                                                        N/A 0.02 mL | 
                                                                                ST Stopper | 
                                                                        N/A 9 | 
                                                                                Pack Size | 
                                                                        N/A 12 | 
